Ounces to Grains Converter

Summary

Enter a weight in ounces to get the exact grain equivalent instantly, with reverse conversion and a quick-reference table.

How it works

1. Enter a weight in the Ounces field to see the equivalent in grains.
2. Or type directly into the Grains field to convert in reverse.
3. The conversion formula updates in real time.
4. Click any row in the reference table to load that value into the converter.
5. Click "Clear" to reset both fields.

Use cases

• Calculate bullet or projectile weights for ballistics and handloading.
• Measure pharmaceutical doses that specify grains (e.g., grains of aspirin).
• Weigh precious metals — gold and silver are still quoted in grains in some markets.
• Determine arrow shaft and broadhead weights for archery tuning.
• Convert historical recipes and apothecary formulas that use grain measurements.
• Convert between Troy ounces and grains for gemstone or powder weights.

Frequently Asked Questions